21969528

素因数分解:

$2^3\times 3^1\times 7^1\times {\mathrm{251}}^1\times {\mathrm{521}}^1$

素因数の和:788

約数の個数: 64

約数和(自身を含む): 63141120

約数和(自身を除く): 41171592

約数列:

[1, 2, 3, 4, 6, 7, 8, 12, 14, 21, 24, 28, 42, 56, 84, 168, 251, 502, 521, 753, 1004, 1042, 1506, 1563, 1757, 2008, 2084, 3012, 3126, 3514, 3647, 4168, 5271, 6024, 6252, 7028, 7294, 10542, 10941, 12504, 14056, 14588, 21084, 21882, 29176, 42168, 43764, 87528, 130771, 261542, 392313, 523084, 784626, 915397, 1046168, 1569252, 1830794, 2746191, 3138504, 3661588, 5492382, 7323176, 10984764, 21969528]

約数ペア:

[(1, 21969528), (2, 10984764), (3, 7323176), (4, 5492382), (6, 3661588), (7, 3138504), (8, 2746191), (12, 1830794), (14, 1569252), (21, 1046168), (24, 915397), (28, 784626), (42, 523084), (56, 392313), (84, 261542), (168, 130771), (251, 87528), (502, 43764), (521, 42168), (753, 29176), (1004, 21882), (1042, 21084), (1506, 14588), (1563, 14056), (1757, 12504), (2008, 10941), (2084, 10542), (3012, 7294), (3126, 7028), (3514, 6252), (3647, 6024), (4168, 5271)]